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1Z1-182試験の準備方法｜更新する1Z1-182模擬問題試験｜一番優秀なOracle Database 23ai Administration Associate模擬問題集
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1Z1-182模擬問題集 & 1Z1-182復習教材
Oracle 1Z1-182認証試験に合格することが簡単ではなくて、Oracle 1Z1-182証明書は君にとってはIT業界に入るの一つの手づるになるかもしれません。しかし必ずしも大量の時間とエネルギーで復習しなくて、弊社が丹精にできあがった問題集を使って、試験なんて問題ではありません。
Oracle Database 23ai Administration Associate 認定 1Z1-182 試験問題 (Q82-Q87):
質問 # 82
Examine this command: ALTER DATABASE MOVE DATAFILE '/u01/sales01.dbf' TO '/u02/sales02.dbf'; Which two statements are true?
- A. It overwrites any existing file with the name sales02.dbf in /u02 by default.
- B. DML may be performed on tables with one or more extents in this data file during the execution of this command.
- C. Compressed objects in sales01.dbf will be uncompressed in sales02.dbf after the move.
- D. The "TO" clause containing the new file name must be specified even if Oracle Managed Files (OMF) is used.
- E. Tables with one or more extents in this data file may be queried during the execution of this command.
正解：B、E
解説：
The ALTER DATABASE MOVE DATAFILE command relocates a data file to a new location while the database remains online, introduced in Oracle 12c and enhanced in subsequent releases like 23ai. Let's evaluate each option:
A . DML may be performed on tables with one or more extents in this data file during the execution of this command.True. The move operation is online by default in Oracle 23ai, allowing DML (INSERT, UPDATE, DELETE) operations on tables within the data file being moved. The database ensures consistency using redo and undo mechanisms.
B . It overwrites any existing file with the name sales02.dbf in /u02 by default.False. By default, the command does not overwrite an existing file unless the REUSE clause is specified (e.g., ALTER DATABASE MOVE DATAFILE ... REUSE). Without it, the command fails if the target file exists.
C . The "TO" clause containing the new file name must be specified even if Oracle Managed Files (OMF) is used.False. When OMF is enabled (via DB_CREATE_FILE_DEST), the TO clause is optional. If omitted, Oracle automatically generates a file name and places it in the OMF destination.
D . Compressed objects in sales01.dbf will be uncompressed in sales02.dbf after the move.False. The move operation is a physical relocation of the data file; it does not alter the logical structure or compression state of objects within it. Compressed data remains compressed.
E . Tables with one or more extents in this data file may be queried during the execution of this command.True. The online nature of the move allows queries (SELECT statements) to proceed without interruption, leveraging Oracle's multi-version consistency model.
質問 # 83
Which two are true about shrinking a segment online?
- A. To shrink a table it must have a PRIMARY KEY constraint.
- B. To shrink a table it must have row movement enabled.
- C. It is not possible to shrink either indexes or Index Organized Tables (IOTs).
- D. It must be in a tablespace that uses Automatic Segment Space Management (ASSM).
- E. To shrink a table it must have a UNIQUE KEY constraint.
正解：B、D
解説：
A .True. ROW MOVEMENT must be enabled for SHRINK SPACE.
B .False. Indexes and IOTs can be shrunk with CASCADE.
C .False. No such constraint requirement.
D .True. ASSM is required for online shrinking.
E .False. No primary key requirement.
質問 # 84
Which two statements are true about views used for viewing tablespace and datafile information?
- A. V$TABLESPACE displays information that is contained in the control file about tablespaces.
- B. V$TABLESPACE displays information about tablespaces contained in the data dictionary.
- C. Tablespace free space can be viewed in DBA_TABLESPACES.
- D. Tablespace free space can be viewed in V$TABLESPACE.
- E. A datafile can be renamed when the database is in MOUNT state and the new file name is displayed when querying DBA_DATA_FILES after the database is opened.
正解：A、E
解説：
A .False. V$TABLESPACE doesn't show free space directly.
B .False. It's from the control file, not the data dictionary.
C .True. Renaming in MOUNT state updates DBA_DATA_FILES post-open.
D .False. DBA_TABLESPACES shows attributes, not free space directly (use DBA_FREE_SPACE).
E .True. V$TABLESPACE reflects control file data.
質問 # 85
Which two statements are true about the configuration and use of UNDO?
- A. Active UNDO is always retained.
- B. UNDO_RETENTION specifies for how long Oracle attempts to keep unexpired UNDO.
- C. UNDO_RETENTION specifies for how long Oracle attempts to keep expired and unconsumed UNDO.
- D. UNDO_RETENTION specifies how long all types of UNDO are retained.
- E. Unexpired UNDO is always retained.
正解：A、B
質問 # 86
Which two statements are true about undo segments and the use of undo by transactions in an Oracle database instance?
- A. Undo segments can be stored in the SYSAUX tablespace.
- B. Undo segments can extend when a transaction fills the last extent of the undo segment.
- C. A single transaction may use multiple undo segments simultaneously.
- D. Undo segments can be stored in the SYSTEM tablespace.
- E. Undo segments can wrap around to the first extent when a transaction fills the last extent of the undo segment.
正解：B、C
解説：
A .False. Undo is stored in a dedicated undo tablespace, not SYSTEM.
B .True. Large transactions can span multiple undo segments.
C .False. Undo isn't stored in SYSAUX.
D .True. Undo segments extend as needed, space permitting.
E .False. Undo doesn't "wrap"; new extents are allocated.
質問 # 87
......
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